Plobleme de configuration postfix

Bonjour,
jai un gros probleme pour bien configurer mon postfix. en fait jai fait un debut du moment ke jarrive a envoyer des mail vers lexteriteur mais ses mail sont resu comme des spam. voici ma config apres la commande postconf -n:

alias_database = hash:/etc/postfix/aliases
alias_maps = hash:/etc/postfix/aliases
command_directory = /usr/sbin
config_directory = /etc/postfix
daemon_directory = /usr/libexec/postfix
debug_peer_level = 2
default_transport = smtp
html_directory = no
inet_interfaces = all
mail_owner = postfix
mailq_path = /usr/bin/mailq.postfix
manpage_directory = /usr/share/man
mydestination = $myhostname, localhost.$mydomain, localhost
mydomain = bea.mr
myhostname = serveurWeb.bea.mr
mynetworks = 192.168.1.246/28, 127.0.0.0/8
mynetworks_style = subnet
myorigin = $mydomain
newaliases_path = /usr/bin/newaliases.postfix
proxy_interfaces = 1.2.3.4
queue_directory = /var/spool/postfix
readme_directory = /usr/share/doc/postfix-2.2.2/README_FILES
relay_domains = $mydestination
relayhost =
sample_directory = /usr/share/doc/postfix-2.2.2/samples
sendmail_path = /usr/sbin/sendmail.postfix
setgid_group = postdrop
unknown_local_recipient_reject_code = 550
repondez moi si vous avez des solution